Electronic cigarette power supply device



FIG. 1 is a front elevational view of an electronic cigarette power supply device showing my new design;

FIG. 2. is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG, 6 is a bottom plan view thereof;

FIG. 7 is a front, right, and top perspective view thereof; and,

FIG. 8 is a rear, left, and bottom perspective view thereof.

The broken lines in the figures are included for the purpose of illustrating portions of the article which form no part of the claimed design. 

CLAIM The ornamental design for an electronic cigarette power supply device, as shown and described. 